1. www.sti-innsbruck.at © Copyright 2008 STI INNSBRUCK www.sti-innsbruck.at RDF Best Practice Best Practice Recipes for Publishing RDF Vocabularies W3C Working Group Note 28. August 2008 - http://www.w3.org/TR/2008/NOTE-swbp-vocab-pub-20080828/

2. www.sti-innsbruck.at Publishing RDF Ontologies Content Negotiation Dereferencable concept URIs HTTP 303 Redirects Concept Name separated from the URI via slash (/) or hash (#) 2

3. www.sti-innsbruck.at Content Negotiation Client specifies preferred format (in HTTP Header), e.g. –Accept: application/rdf+xml –Accept: application/xhtml+xml, text/html Fallback type must be specified 3

4. www.sti-innsbruck.at Dereferencable Ontology URIs 4 Example:  Access e-Freight Ontology: http://efreight.sti2.at/ontology/crs.owl http://efreight.sti2.at/ontology/crs.owl

5. www.sti-innsbruck.at Dereferencable Concept URI 5 Example:  GET the class Shipment: http://efreight.sti2.at/ontology/crs.owl#Shipment http://efreight.sti2.at/ontology/crs.owl#Shipment  Redirect to vocabulary URI: http://efreight.sti2.at/ontology/crs.owl http://efreight.sti2.at/ontology/crs.owl

6. www.sti-innsbruck.at Server-Side Configuration.htaccess for ‘hash namespaces‘, e.g. http://efreight.sti2.at/ontology/crs.owl#Shipment http://efreight.sti2.at/ontology/crs.owl#Shipment AddType application/rdf+xml.owl RewriteEngine On RewriteBase /crs RewriteRule ^crs$ crs.owl.htaccess for ‘slash namespaces’, e.g. http://efreight.sti2.at/ontology/crs/Shipment http://efreight.sti2.at/ontology/crs/Shipment AddType application/rdf+xml.owl RewriteEngine On RewriteBase /crs RewriteRule ^crs/.+ crs/ [R=303] RewriteRule ^crs/$ crs.owl 6

7. www.sti-innsbruck.at Redirect to SPARQL Query Server-side configuration (.htaccess file) RewriteCond %{HTTP_ACCEPT} text/html RewriteRule ^crs/(.+) http://dbpedia.org/$1 [R=303] RewriteCond %{HTTP_ACCEPT} application/rdf\+xml RewriteRule ^crs/(.+) http://dbpedia.org/sparql?query=DESCRIBE+ [R=303] 7

8. www.sti-innsbruck.at Summary Dereferencable URIs for all concept in the ontology 303 Redirect to the Ontology if a concept is accessed Possible to separate the namespace with a slash (/) or a hash (#) Content Negotiation with fallback type Redirecting to SPARQL Query 8